First of all this is not my plane. The guy that owns it
flys it alot and has no over heating problems
at all while in flight. But he told me that after each flight
you need to let it cool down a little before starting
it back up again and flying it again. I think it does
use a little mor fuel cause he ussually flys for only
8 to 12 min. But this plane is wicked and if you fly wide
open throttle for 8 min or so you are ready to set it
down because of the high control demand. Yes I
have flew it but only for 5 min and thats all i wanted
of it cause its a hand full.

He has had this engine for a long time and it runs great.
I think the wankle engine runs about 350.00 USD.
Would i buy one No not at my age but if i was 20 yrs
younger and i liked speeeeeeeeeeeeeeed yes i would.